EP0534688A2 - Procédé et dispositif pour la fabrication en continu d'une pièce formée - Google Patents

Procédé et dispositif pour la fabrication en continu d'une pièce formée Download PDF

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Publication number
EP0534688A2
EP0534688A2 EP92308498A EP92308498A EP0534688A2 EP 0534688 A2 EP0534688 A2 EP 0534688A2 EP 92308498 A EP92308498 A EP 92308498A EP 92308498 A EP92308498 A EP 92308498A EP 0534688 A2 EP0534688 A2 EP 0534688A2
Authority
EP
European Patent Office
Prior art keywords
endless belts
endless
endless belt
forming passage
formed piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92308498A
Other languages
German (de)
English (en)
Other versions
EP0534688A3 (en
EP0534688B1 (fr
Inventor
Noriyasu# Saeki
Koichi# Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Publication of EP0534688A2 publication Critical patent/EP0534688A2/fr
Publication of EP0534688A3 publication Critical patent/EP0534688A3/en
Application granted granted Critical
Publication of EP0534688B1 publication Critical patent/EP0534688B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/30—Expanding the moulding material between endless belts or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B29C70/504—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands

Definitions

  • the present invention relates to a continuous manufacturing apparatus of a fiber reinforced foamed resin formed piece for manufacturing foamed resin formed pieces used in various applications including sleepers and building materials, or similar formed pieces, and a manufacturing method utilizing such apparatus.
  • a manufacturing method as disclosed, for example, in the Japanese Patent Publication Sho. 52-2421 is known.
  • this manufacturing method as shown in Fig. 17 and Fig. 18, multiple long fibers a are arranged parallel and moved continuously, and a foam-curing resin solution is sprayed on the way to the long fibers a to impregnate.
  • the long fibers a impregnated with the foam-curing resin solution are led into a forming passage d of formed piece c shaped in a square cross section by four endless belts b.
  • a bundle e of the long fibers impregnated with the foam-curing resin solution is foamed and cured while passing through this forming passage d.
  • a long foam formed piece f in a square cross section is manufactured continuously.
  • the foam formed piece f is manufacturing in such process.
  • the forming die c used in this manufacturing method since the four endless belts b for composing the forming passage d are of fixed type, to change the cross sectional shape of the foam formed piece f (to change the cross sectional slender ratio), it was necessary to disassemble the constituent members including the upper, lower, right and left rollers g of the forming passage d and endless belts b, exchange the constituent members so as to compose a desired shape of the foam formed piece, and reassemble the forming passage, which was a great demerit.
  • a manufacturing apparatus as disclosed in the Japanese Utility Model Publication sho. 59-36415 was developed.
  • this apparatus essentially, as shown in Fig.19 , four endless belts b are disposed in a mutually confronting manner at specific intervals so as to compose upper, lower, right and left sides, and a forming passage d of a square cross section is constructed.
  • the endless belts b for composing the upper and lower sides of the forming passage d are defined in the movement in the upper direction and lower direction by rollers g disposed along the longitudinal direction of the forming passage d, so that the interval of the upper side and lower side of the forming passage d is always fixed at a specific gap.
  • the right and left sides of the forming passage d composed of the endless belts b are laid out so as to be held between the endless belts b composing the upper side and lower side.
  • a side frame i having a permanent magnet h, and a bearing i for supporting the side frame i are disposed so that the both endless belts b may not collapse into the passage d in the manufacturing process of the foam formed piece.
  • the essential parts of the manufacturing apparatus disclosed in the Japanese Utility Model Publication Sho. 59-36415 are composed as described above.
  • the dimension in the widthwise direction of the foam formed piece to be formed can be freely changed by moving the endless belts b forming the both side surfaces, but the interval for forming the thicknesswise direction of the foam formed piece is constant in its structure, and therefore when changing, it was necessary to disassemble the endless belts b of both sides, replace the right and left sides with endless belts of desired width, and reassemble the forming passage d.
  • the invention was developed in the light of such background, and it is hence a primary object thereof to present a continuous manufacturing method of formed piece capable of changing the size of the cross section of the forming passage by simple operation, forming a formed piece of a desired-sectional shape easily and efficiently, and preventing leak of resin solution from the forming passage, and its apparatus.
  • the invention presents a formed piece continuous manufacturing apparatus characterized by disposing four endless belts parallel, filling a forming passage enclosed and formed by these four endless belts with material, and forming the material continuously in a slender formed piece along with the progress of the endless belts, wherein one end of each endless belt in the longitudinal direction slidably abuts against the specified inner surface of each endless belt, at least three endless belts are movably supported by each movable means, and the sectional shape of the forming passage is freely controlled by arbitrarily moving at least three endless belts.
  • one of the four endless belts composing the forming passage is fixed, the other three endless belts are provided with movable means, and these three endless belts are arbitrarily moved by the moving means, thereby composing the forming passage in a desired sectional shape.
  • the lower side endless belt is fixed, among the four endless belts for composing the forming passage, and the upper side and right side and left side endless belts are provided with movable means so as to be mobile, and by each moving means, the upper side endless belt can be moved in the vertical and lateral directions, one lateral side endless belt having one end in the longitudinal direction contacting with the inner surface of the lower side endless belt can be moved in the lateral direction, while the other lateral side endless belt can be moved in the vertical direction, thereby composing arbitrarily the forming passage in a desired sectional shape.
  • a belt constraining jig is disposed at the end of each endless belt not contacting with the other endless belts, so that each endless belt may be pressed against the other contacting endless belt side.
  • a sealing member is disposed along the longitudinal direction, at one end of each endless belt disposed movable on the inner surface of the other endless belts.
  • a thread piece feeding device is installed so as to feed a thread piece for sealing the gap between the end of the endless belt and the upper side of the other endless belts.
  • the invention also relates to a continuous manufacturing method of fiber reinforced foam resin formed piece, using the forced piece continuous manufacturing apparatus wherein the forming passage is filled with a reinforcing material impregnated with a foam-curing resin solution, and the foam-curing resin solution is foamed and cured in the running process of the endless belts, thereby manufacturing a slender formed piece in a desired sectional shape.
  • the sectional shape (vertical and lateral dimensions) of the forming section composed by the four endless belts can be set, and by continuously passing the reinforcing material impregnated with a foam-curing resin solution in this forming passage, and foaming and curing the foam-curing resin solution in this process, a slender formed piece of a desired sectional shape can be manufactured by simple moving manipulation of the endless belts.
  • the thread form feeding device When the thread form feeding device is installed, moreover, by the foaming pressure of the material such as foam-curing resin solution filling up the forming passage for continuously manufacturing slender formed pieces, the thread piece supplied from the thread piece feeding device is pressed against the gap of endless belts to seal the gap, thereby preventing running of burr.
  • the foaming pressure of the material such as foam-curing resin solution filling up the forming passage for continuously manufacturing slender formed pieces
  • numeral 1 denotes a continuous manufacturing apparatus of a fiber reinforced foam resin formed piece in an embodiment of the invention
  • 2, 3, 4, 5 are four endless belts for composing a forming passage 6 for continuously passing a reinforcing material impregnated with foam-curing resin solution, foaming and curing the foam-curing resin solution in this process, and forming a desired fiber reinforced foam resin formed piece (hereinafter called a slender forced piece).
  • the upper surface, lower surface, and both side surfaces of the forming passage 6 are composed by these endless belts 2, 3, 4, 5, and the endless belts 2, 3, 4, 5 on the upper surface, lower surface, and side surfaces of the forming passages 6 are disposed parallel to each other.
  • the endless belts 2, 3, 4, 5 are disposed, as shown in Fig. 2 and Figs. 9 to 12, so that one end of each endless belt in the longitudinal direction may abut against the top surface of specified endless belt slidably with a proper pressure, thereby preventing the burr from running out from the contacting surface of the end of each belt and top of the other belts when foaming and forming.
  • one end 2a in the longitudinal direction of the endless belt 2 in the upper surface is disposed so as to contact slidably with the inner surface 5a of the right side endless belt 5, one end 4a in the longitudinal direction of the left side endless belt 4, with the inner surface 2b of the upper surface endless belt 2, one end 3a in the longitudinal direction of the lower surface endless belt 3, with the inner surface 4b of the left side endless belt 4, and one end 5a in the longitudinal direction of the right side endless belt 5, with the upper surface 3b of the lower surface endless belt 3.
  • the upper surface endless belt 2 is movable vertically and laterally by movable means described below, and the left side endless belt 4 is movable in the vertical direction.
  • the right side endless belt 5 is movable in the lateral direction.
  • the lower surface endless belt 3 is fixed at a specified position.
  • the outer surface is formed of steel belt 8, and a slat chain 9 is disposed along the steel belt 8.
  • the slat chain 9 is formed like a caterpillar, that is, slats 9a of about 200 to 300 millimeters are engaged end to end mutually formed in undulations, and are coupled by a coupling shaft 10, and formed endlessly.
  • a round magnet 11 is buried, and by this magnet 11, the steel belt 8 disposed outside of the slat chain 8 is attracted by the magnetic force. It prevents the steel belt 8 of the upper surface endless belt 2, for example, from drooping down by its own gravity while the forming passage 6 is not filled up with slender forced pieces.
  • this magnet 11 may be installed either only on the slat chain 9 of the upper surface endless belt 2, or also on the slat chains 9 of the other endless belts 3, 4, 5.
  • the steel belt 8 is protected in its strength, and, at the same time, the foam-curing resin solution leaking out from the steel belt 8 is prevented from invading further into the apparatus at the lover position.
  • the slat chains 9 of the endless belts 2, 3, 4, 5 are supported by rollers 12 which are rotatably pivoted at specific intervals, and the steel belt 8 is designed to be free to rotate in the longitudinal direction through slat chains 9.
  • the movable upper surface and both side endless belts 2, 4, 5 are provided with movable means. That is, the upper surface endless belt 2 is movable in the vertical and lateral directions as mentioned above, and multiple jacks 13 are disposed at specific intervals in the longitudinal direction of the endless belt 2 as movable means.
  • Each jack 13 is engaged with a vertical shaft 15 of the jack 13 through a threaded shaft 14, and by rotating the threaded shaft 14 of the jack 13 at the end part, the vertical sahft 15 of the jacks 13 arranged in a row is moved up and down, and the part of the steel belt 8 for composing the upper surface of the forming passage 6 is moved up and down by this motion, so that the vertical (height) dimension of the forming passage 6 may be changed.
  • the movable means for moving the upper surface endless belt 2 in the lateral direction multiple jacks 16 are laid on a support frame 17 in a lateral row at specified intervals.
  • a pushing member 18 slidably erected on the support frame 17 is disposed.
  • the rod end 16a can be moved in the lateral direction.
  • the upper surface endless belt 2 can be moved in the lateral direction, while the right side endless belt 5 is simultaneously moved in the lateral direction. In this way, the lateral dimwension of the sectional shape of the forming passage 6 can be changed.
  • the moving means for moving the left side endless belt 4 in the vertical direction multiple jacks 20 are disposed on the support frame 17 in a row at specified intervals, and by rotating one end of a threaded shaft 20b of the jack 20 located at the end of each jack 20, the rod 20a of the interlocked jacks 20 are expanded or contracted in the vertical direction, so that the endless belt 4 can be moved in the vertical direction.
  • the vertical (height) dimension of the forming passage 6 can be changed together with the vertical motion of the upper surface endless belt 2.
  • the movable means for moving the endless belts 2, 4, 5 are manipulated to move, for example as shown in Figs. 9 to 12, the endless belts 2, 4, 5 vertically and laterally, and the forming passage 6 of desired sectional shape (size) is formed (set), and the reinforcing material impregnated with foam-curing resin solution is continuously passed in this forming passage 6, and the foam-curing resin solution is foamed and cured in this process, and a desired slender formed piece is composed.
  • a take-up machine for taking up the slender formed pieces is disposed at the rear end of the apparatus of the invention.
  • the endless belts 2, 3, 4, 5 are rotated along with the movement of the slender formed piece.
  • the endless belts 2, 3, 4, 5 are pressed, and when the slender formed piece moves, the endless belts 2, 3, 4, 5 rotate and move in harmony.
  • the movable means of the endless belts 2, 4, 5 are first manipulated to move the endless belts 2, 4, 5 to compose (set) a forming passage 6 in a desired shape and size, and the reinforcing material impregnated in foam-curing resin solution is continuously passed in this forming passage 6, and a desired slender formed piece is obtained.
  • Fig. 13 and Fig. 14 relate to other embodiment, in which sealing members 21 are disposed along the longitudinal direction at the ends 2a, 3a, 4a, 5a of the endless belts 2, 3, 4, 5 disposed movably inside the other endless belts 3, 4, 5, 2, at the inner side of the forming passage 6 formed by the four endless belts 2, 3, 4, 5.
  • the sealing members 21 are square posts of a triangular cross section, and are preferably made of silicone rubber considering the parting property.
  • the sealing members 21 are pressed against the upper surfaces of the other endless belts 3, 4, 5, 2 by the foaming pressure of the foam-curing resin solution to seal up the gaps of the endless belts. As a result, it is effective to prevent the burr from running out of the forming passage 6 from the gaps of the endless belts.
  • Fig. 15 and Fig. 16 relate to another embodiment, in which a thread piece feeding device 22 is provided in the formed piece continuous manufacturing apparatus 1.
  • This tread piece feeding device 22 is intended to supply a thread piece 23 along the longitudinal direction of the forming passage 6 at four corners of the forming passage crossing orthogonally between the endless belts 2, 3, 4, 5 and other endless belts 3, 4, 5, 2.
  • This thread piece 23 is designed to fill up the gaps of the endless belts 2, 3, 4, 5 and the other endless belts 3, 4, 5, 2 as being pressed by the foaming pressure generated at the time of manufacturing the formed piece, thereby preventing the burr from running out through the gaps.
  • Each thread piece 23 supplied at four corners in the forming passage 6 is supplied by a thread feeding part 24 composing the thread piece feeding device 22, a tension adjusting roller 25 for preventing looseness of the thread piece 23, a thread guide 26 for guiding the thread piece up to the entrance of the forming passage 6, and thread take-up device (not shown).
  • Each constituent ement is disposed near the entrance of the forming passage 6 at shown in the draweing.
  • the diameter of the thread piece 23 is about 0.5 to 2 mm, and kind of thread is desired to be a thick single fiber of nylon or other synthetic fiber, rather than a doubled yarn of fine fibers. This is because the doubled yarn is often poor in sealing performance due to penetrationof resin or defomation by foaming pressure. Besides, by using synthetic fiber with smooth parting performance from the urethane resin, the thread can be easily separated from the formed piece A by taking up simultaneously when parting the foamed piece A. Furthermore, the thread with poor parting property may be processed later by chamfering.
  • organic and inorganic long fibers can be used, and in particular roving of glass fiber is desired.
  • foaming resin foaming urethane resin, polyester resin, phenol resin, urea resin or the like may be used.
  • the invention is not limited to the fiber reinforced foam resin formed pieces mentioned above alone, and can be also applied in manufacture of similar formed pieces, for example, general resin formed pieces, resin formed pieces, and inorganic formed pieces. In such cases, by taking up the manufactured formed pieces, it is difficult to rotate and move the endless belts 2, 3, 4, 5, and it is necessary to use a separate apparatus for rotating and moving the endless belts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Composite Materials (AREA)
  • Chemical & Material Sciences (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Adornments (AREA)
  • Moulding By Coating Moulds (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Molding Of Porous Articles (AREA)
  • Fish Paste Products (AREA)
  • Confectionery (AREA)
EP92308498A 1991-09-21 1992-09-17 Procédé et dispositif pour la fabrication en continu d'une pièce formée Expired - Lifetime EP0534688B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP242162/91 1991-09-21
JP3242162A JP2994502B2 (ja) 1991-09-21 1991-09-21 成形体連続的製造装置並びに製造方法

Publications (3)

Publication Number Publication Date
EP0534688A2 true EP0534688A2 (fr) 1993-03-31
EP0534688A3 EP0534688A3 (en) 1993-08-04
EP0534688B1 EP0534688B1 (fr) 1997-05-28

Family

ID=17085256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92308498A Expired - Lifetime EP0534688B1 (fr) 1991-09-21 1992-09-17 Procédé et dispositif pour la fabrication en continu d'une pièce formée

Country Status (8)

Country Link
US (2) US5340300A (fr)
EP (1) EP0534688B1 (fr)
JP (1) JP2994502B2 (fr)
KR (1) KR100242827B1 (fr)
AT (1) ATE153590T1 (fr)
AU (1) AU654580B2 (fr)
CA (1) CA2078752C (fr)
DE (1) DE69219977T2 (fr)

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JP2994502B2 (ja) * 1991-09-21 1999-12-27 新日本製鐵株式会社 成形体連続的製造装置並びに製造方法
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IT1275312B (it) * 1995-06-06 1997-08-05 Plastedil Sa Apparecchiatura per la formatura di un elemento continuo in materia plastica espansa
IT1286443B1 (it) * 1996-12-05 1998-07-08 Plastedil Sa Apparecchiatura a pareti regolabili per la formatura di un elemento continuo in materia plastica espansa
JP4568449B2 (ja) * 2000-09-26 2010-10-27 積水化学工業株式会社 長繊維強化樹脂成形体の製造方法及び製造装置
US7763341B2 (en) 2004-01-23 2010-07-27 Century-Board Usa, Llc Filled polymer composite and synthetic building material compositions
US7211206B2 (en) * 2004-01-23 2007-05-01 Century-Board Usa Llc Continuous forming system utilizing up to six endless belts
EP1776216A4 (fr) 2004-06-24 2009-04-08 Century Board Usa Llc Installation de fabrication en continu d'articles tridimensionnels en mousse
US7794224B2 (en) 2004-09-28 2010-09-14 Woodbridge Corporation Apparatus for the continuous production of plastic composites
US20070222106A1 (en) 2006-03-24 2007-09-27 Century-Board Usa, Llc Extrusion of polyurethane composite materials
US8846776B2 (en) 2009-08-14 2014-09-30 Boral Ip Holdings Llc Filled polyurethane composites and methods of making same
US9481759B2 (en) 2009-08-14 2016-11-01 Boral Ip Holdings Llc Polyurethanes derived from highly reactive reactants and coal ash
CA2851349C (fr) 2011-10-07 2020-01-21 Russell L. Hill Composites de polymere inorganique/polymere organique et procedes pour les preparer
WO2014168633A1 (fr) 2013-04-12 2014-10-16 Boral Ip Holdings (Australia) Pty Limited Composites formés à partir d'une charge absorbante et d'un polyuréthane
WO2016018226A1 (fr) 2014-07-28 2016-02-04 Crocco Guy Utilisation d'agents réfrigérants évaporatifs pour fabriquer des composites de polyuréthane chargés
WO2016022103A1 (fr) 2014-08-05 2016-02-11 Amitabha Kumar Composites polymères chargés comprenant des fibres de courte longueur
WO2016118141A1 (fr) 2015-01-22 2016-07-28 Boral Ip Holdings (Australia) Pty Limited Composites de polyuréthanne hautement chargés
GB2587297B (en) 2015-03-31 2021-08-04 Fisher & Paykel Healthcare Ltd A user interface and system for supplying gases to an airway
US10030126B2 (en) 2015-06-05 2018-07-24 Boral Ip Holdings (Australia) Pty Limited Filled polyurethane composites with lightweight fillers
WO2017082914A1 (fr) 2015-11-12 2017-05-18 Boral Ip Holdings (Australia) Pty Limited Composites de polyuréthane chargés de charges à taille calibrée
WO2018029638A1 (fr) 2016-08-11 2018-02-15 Fisher & Paykel Healthcare Limited Conduit pliable, interface patient et connecteur de casque
JP6914875B2 (ja) * 2018-03-14 2021-08-04 株式会社荒川製作所 成形装置
CN109334051A (zh) * 2018-11-30 2019-02-15 南平市建阳区腾跃橡胶机械有限公司 钢带式循环模板和纤维增强材料成型设备

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Publication number Priority date Publication date Assignee Title
US4025257A (en) * 1972-05-17 1977-05-24 Sekisui Kagaku Kogyo Kabushiki Kaisha Apparatus for continuously manufacturing an elongated reinforced shaped article
DE2729219A1 (de) * 1977-06-29 1979-01-04 Kurt Olbrich Verfahren und vorrichtung zum herstellen von geschichteten formteilen aus kunststoffen
DE3341438C1 (de) * 1983-11-17 1985-06-27 Fa. Carl Freudenberg, 6940 Weinheim Verfahren und Vorrichtung zur Herstellung einer Platte aus thermoplastischem Schaumkunststoff
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GB2242156A (en) * 1990-03-20 1991-09-25 Ind E Comercio De Acumuladores A mold for producing thermoplastic products by a blow molding process

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101050614B (zh) * 2006-04-04 2012-09-19 积水化学工业株式会社 合成树脂成形体、其制造方法以及其制造***

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US5340300A (en) 1994-08-23
AU654580B2 (en) 1994-11-10
ATE153590T1 (de) 1997-06-15
EP0534688A3 (en) 1993-08-04
KR930005757A (ko) 1993-04-20
AU2524392A (en) 1993-03-25
EP0534688B1 (fr) 1997-05-28
JPH05237947A (ja) 1993-09-17
KR100242827B1 (ko) 2000-02-01
US5458831A (en) 1995-10-17
JP2994502B2 (ja) 1999-12-27
CA2078752A1 (fr) 1993-03-22
DE69219977D1 (de) 1997-07-03
CA2078752C (fr) 2004-05-11
DE69219977T2 (de) 1997-11-06

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